Draft-regulator for furnaces.



A. F. LEWIS:-

DRAFT REGULATOR FOR rmimozs.

APPLICATION FILED JUNE 13, 1910.

' sufliciently-"the' expansionregulator-will be s 3 a utonaticallythrown into operation. s 1 i My'- invention"will be'describedin detail *1 hereinafter,-and; illustrated in the a'ccom- To all whom'itmy content; a iBe-it' known that I, ALBERT Lnwis,' a citiz'enofthe-United States, residing 'at .Urbanmin the county of Gharnp'aign andState 'of Ohio,' have'mvented certain new.

and useful Improvements in Draft-Regulators for Furnaces, of which thefollowing is a specification.

My invention relates to devices fhr auto matically regulating the draftsof furnaces by the emplo ment of an ex ansible rod in the furnace t atis operative y connected to the drafts, and has for one of its objectsthe -p vision of means by which the. regulating rod 'may'l be',lengthened and shortened inaccordance. 'with the'weather'condit-ions;

An'oth g object "ofm invention is the rovisionbfmeans by w 'ch thedrafts may heldgiopenwhilea fresh fire is being 'started,andwhentheirshas burned up pan, fng drawingsin which- I rel -is-asldeview of a conventional I furnacepartly broken'away and showing myodtaftregulaton applied thereto, Fig. 2-, a

. ing joist of the lo" :view-v of: the dial and pointer, and Eigi'3, adetail'viewfof the link to which the draftchains are attached.

In the "drawmgs similar reference characters indicate correspondingparts in all iof-the'views'. 35

{A indicates a furnace of conventional ty havi the draft opening Badjacent to "its base c osed by hintged door C, and D a ceilurnace roomhaving the dependingbrackets E, F secured thereto;

1 indicates the draft regulating bell crank lever piveta-lly secured tothe lower end of bracket E, 2 a dial plate also secured to the bracket,3 theexpansihle rod'Qf copper or other suitable metal-having one andmounted in thelower end oflbracket F and its other endinserted throughthe depending end 1 1 two ends .of rod 3 b i threaded as showfiw 6'0 "athand 4'.

of hell crank leverl and dial plate"), the

5 indicates a thumb nut having an tegral pointer 6, mounted on threadedend 4; of the rod 3, and 7 a bloic'k looselyfmounted on the rod- 3and-having a transverse angu-' lar groove 7 thereon'that engages angular'projec'tion 8 on the end of lever 1.

9 indicates a thumb nut on threaded end warm t that but a slightadjustment'of "the -arniwhen the summon croissants, cine.-

' nnAr'r-nneumron lion mansions P =911leat1onnuetteis me iatented-Dec.fl6419i0i Application filedJu'ae 1a, 19l0. Serial1161586506. v.

4- for adjusting-the length of the rod with installing the apparatus, tosuitthe indiv idual furnace.,

10 indicates ahorizontal arm rigid-lsecured to bracket E, 11:41 sleevesli ably mounted on arm '10, 1'2 a-;rod pivotall secured tosl'eevellfand 13 a thread rod swivelly secured't'o the end of rod lit-hatengages a threaded bore 14 in verticalarm' 15 secured to regulatinglevercl. 16 indicates a plate having two slots'li' and 18 therein, and ahook lll to-which the chain 20 is secured- 'that supports the draft door0. The. end-oilever 1 engages 'slot 18 so that'as therodhiexpands oncontracts under the influence of the heat ,doorlC is 'liftedor closed asdesired tokeefi'th elfire v i burninghproperly to createsuflicient'heattow 0 building. The dial plate 2 asshown in. Fififl-liasthe degrees of temperature indicat was;

- face and iiiuse it is intended that the pointer:

be set at the point to indicatethetempera 4 1 ture outside of the houseand-this-will regu late the o erative length of the 3 so 4 to "keep t etemperature lathe-house atfa comfortable degree. It-{has been found thatI I i a change of ten degrees in the temperatura g; utside'of the houseinakesa change of one degree within so that it will be apparent 4 theoperative length of the-rod '3 isnecessary to keep the temperaturewithin the-house the same at all times .As in startin'g'a furnace-fireit is desirable t6 let-the'fire burn briskly for: time to thoroughlywarm the house before starting. the automatic re ulation of the furnace4. and p mg the late .on the end of-armfby'insertin' t e am! throughslot 11. This will hold t 'edraft dooropem til'fthehmt of the furnacehas so'expaxi efdxthe-rod il that: the movement lever ff and f verticalaria 15 "is-sufiicient to move. the sleeve llto 'th the draft door: willbe started 1 21 indicates a weight susfiended ver 1 and normally tending.to 'niove it, wardly. Having thus described my venfionwhat-ai i Iclaim1s'- ""-'1 10 '1. In combinationwithai. a pivoted draftdoog ihraokfefifijfiitgfi drafts I, accomplish this b lifting the law". 16with chain 20 and drafzdoor p cured adjacent to the furnace, a leverfulornmed on one of the brackets, a horizontal rm secured to the samebracket, an expanle rod ecured to the lever and the other- 5 bracket andextending through the furnaceafor d, a plate connected to the draft doormul'hav1ng two slots therein, one of said slots being-adapted to engagethe lever aforoaaid'and the other slot to exwage the l arnr af resai. 1,and means operated by the lever to remove the plate from the arm.

2. 1n combination irith a furnace having a pivoted draft door; bracketssuitably c red adjacentto the furnace, a lever ful- 1 er m d on one ofthe brackets, a horizontal farm secured-to the same bracket, anexpansible' rod secured to the lever and the other. bracket andextending through the furnace aforesaid, a plate connected to the 2!)draft door and having a slot therein to engage the arm, a sleeveslidablv mounted on the hormontalarm, a vertical arm secured t0 e lever,and operative means connecting.t-l1e. vertical aria and sleeveaforesaid.

3., In combination with a furnace-having a PlVOtGCl draft door, bracketseuttahly secured adjacent to the furnace, a lever fulcrnmed on one ofthe brackets, a horizontal arm secured to the same bracket, anexpansible rod secured to the lever-and the other bracketand extendingthrough the furnace'aforesaid, a plate connected to the draft door andhaving two slots therein, one

of said slo'ts being adapted to engage the I t imony whereof. I heretoaffix my."

signature in the presenceof two witnesses. I ALBERT F. LElViS,\Yitncssesz' J. R. IIUGHES,

K, Brown.

